Try this driver utility. It will scan your system and find drivers for you that will work. It may be your only shot and finding the drivers you need without finding the direct download links from somewhere.

If you cannot find your model, try this:
Start-Programs-Accessories-System Tools-System Information. Click on "components" and highlight "problem devices". Any hardware device with a driver problem will be listed here. Make a note of the PNP Device ID line of the entry. It will contain a Vendor number and a Device number (VEN. . . . DEV. . . .)
both four digits long.
Look up those numbers here: